2013—2020年京津冀地区臭氧浓度变化及其与气象因子关系分析

doi:10.3969/j.issn.1673-503X.2024.04.011

Abstract

Abstract:

Using the daily maximum 8-hour moving average values of near-surface ozone concentration data from 2013 to 2020 in the Beijing-Tianjin-Hebei region and concurrent atmospheric reanalysis data, this study employs Empirical Orthogonal Functions (EOF) and Singular Value Decomposition (SVD) techniques to analyze the variations in near-surface ozone concentrations, the typical spatial distribution of ozone modal concentrations, and their relationships with major meteorological factors. The results indicate that the near-surface ozone concentration in the Beijing-Tianjin-Hebei region overall shows an increasing trend, with significant increases noted from 2017 to 2019, exhibiting a spatial distribution pattern of higher concentrations in the south and lower in the north. The first mode of the EOF reveals consistent spatial variability in near-surface ozone concentrations across the region, with the most significant changes observed in the areas around the junctions of Baoding, Shijiazhuang, Hengshui, and Cangzhou. The daily maximum 8-hour moving average values of ozone concentration are positively correlated with the temperature at 15:00 and the meridional wind speed, and negatively correlated with the relative humidity at the same time, with these correlations being most significant in the southern part of the Beijing-Tianjin-Hebei region.

Key words: Pollution day, Empirical Orthogonal Function (EOF), Singular Value Decomposition (SVD)

CLC Number:

X515/P468

Yannan HU,Wenxing LI,Zhi ZHANG,Yayin JIAO. Analysis of ozone concentration variations and their relationships with meteorological factors in the Beijing-Tianjin-Hebei region from 2013 to 2020[J]. Journal of Meteorology and Environment, 2024, 40(4): 90-99.

Figures/Tables 13

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时间系数	气温	相对湿度	纬向风速	经向风速
第一模态	0.74^*	-0.13	-0.03	0.45^*
第二模态	-0.08	-0.23^*	0.13	-0.36^*

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Analysis of ozone concentration variations and their relationships with meteorological factors in the Beijing-Tianjin-Hebei region from 2013 to 2020

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